\begin{figure}[htb]
	\centering
	
	\begin{pdfpic}
	\psframe[linewidth=0.1,dimen=outer](4.0,0.4)(0.0,-0.4)
\usefont{T1}{ptm}{m}{n}
\rput(2.0163085,0.005){modelview matrix}
\psframe[linewidth=0.1,dimen=outer](5.9,0.4)(3.9,-0.4)
\usefont{T1}{ptm}{m}{n}
\rput(4.922002,0.005){fovy}
\psframe[linewidth=0.1,dimen=outer](8.4,0.4)(5.8,-0.4)
\usefont{T1}{ptm}{m}{n}
\rput(7.117344,0.005){aspect ratio}
\psframe[linewidth=0.1,dimen=outer](10.9,0.4)(8.3,-0.4)
\usefont{T1}{ptm}{m}{n}
\rput(9.652295,0.005){screen error}
	\end{pdfpic} 
	\caption{Viewing Parameter Packet}
	\label{fig:viewparampacket}

\end{figure}